﻿@{
    Layout = null;

}
<!DOCTYPE HTML>
<html>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title></title>

    @*<link href="css/index_style.css" rel="stylesheet" type="text/css">
        <script src="./js/jquery.min.js"></script>*@
    <link href="~/css/index_style.css" rel="stylesheet" />

    <script src="~/js/jquery.min.js"></script>
</head>

<body>
    <div class="header" id="demo" over-flor:auto>
        <!-- <div class="top_logo"></div> -->
        <ul class="nav" id="nav" >
        </ul>
        <div class="canvaszz"> </div>
        <canvas id="canvas"></canvas>
        <section class="count">
            <ul class="clear-fix" id="cumulative"></ul>
        </section>
        <button id="btn">开始抽奖</button>
        <input type="text" id="inp"style="background:none;width:30px;-webkit-box-shadow: 0 0 6px #1d7eb8;border:none;position:fixed;color:#fff;outline:none;bottom:0;right:0;z-index:333;">
               
    </div>












    <script>


        "use strict";
        // 总人数
        let pCount = 29;
        // 抽奖次数
        let tNumber = 29;





        let lList = [];
        let ls = localStorage;
        function setLocal() {
            for (let j = 0; j < pCount; j++) {
                let num = j + 1;
                lList.push(num < 10 ? '00' + num : num > 9 && num < 100 ? '0' + num : '' + num);
            }
            ls.setItem('list', JSON.stringify({
                data: lList
            }))
        }
        function localData() {


            if (!ls.getItem('list')) {
                setLocal()
            }
            else {
                lList = JSON.parse(ls.getItem('list')).data;
                if (lList.length < tNumber) {
                    ls.removeItem('list');
                    setLocal();
                }
            }
        }
        localData();


        var $s = function (id) {
            return document.getElementById(id);
        }
        var statisticsFn = {
            preAr: [0, 0, 0],
            oneTime: 0,
            autoScroll: function (elementContainer, scrollHeight) {
                var count = 0;
                var timer = null;
                timer = setInterval(function () {
                    count += 1;
                    elementContainer.style.marginTop = -count + 'px';
                    if (Math.abs(elementContainer.offsetTop) >= scrollHeight) {
                        var rmElement = elementContainer.firstElementChild
                            && elementContainer.removeChild(elementContainer.firstElementChild);
                        rmElement && elementContainer.appendChild(rmElement);
                        elementContainer.style.marginTop = 0;
                        count = 0;
                        elementContainer.lastElementChild
                            && elementContainer.removeChild(elementContainer.lastElementChild);
                        clearInterval(timer);
                        timer = null;
                    }
                }, 10);
            },
            render: function (data, elemment) {
                this.oneTime++;
                var conversionAr = [];
                var result = '';
                var diffAr = [];
                var _this = this;
                if (typeof data === 'string') {
                    conversionAr = data.split('');
                }
                else if (Array.isArray(data)) {
                    conversionAr = data;
                }
                else {
                    return false;
                }
                conversionAr.forEach(function (item, index) {
                    result += '<li id=single_' + index + '><span>' + item + '</span></li>';
                });
                elemment.innerHTML = result;
            }
        }

        statisticsFn.render('000', $s('cumulative'));

        let ctimer = null;
        let cList = [];
        $('#btn').click(function () {
            $('#nav').find('li').each(function (index, item) {
                $(item).remove();
            })
            if ($('#inp').val()) {
                tNumber = +$('#inp').val();
            }
            if (tNumber < 7) {
                $('.nav').removeClass('b');
                $('.nav').addClass('a');
            }
            else {
                $('.nav').removeClass('a');
                $('.nav').addClass('b');
            }
            $('.nav').animate({
                opacity: '0'
            }, 100);
            $('#cumulative').animate({
                opacity: '1'
            }, 100);
            if (lList.length < tNumber) {
                localData();
            }
            if (ctimer) {
                let html = '';
                $.each(cList, function (index, item) {
                    html += `<li class="gv">获奖人员编号：${item}</li>`;
                })
                for (let j = 0; j < cList.length; j++) {
                    let idx = lList.indexOf(cList[j]);
                    if (idx > -1) {
                        lList.splice(idx, 1);
                    }
                }
                ls.setItem('list', JSON.stringify({
                    data: lList
                }))
                $('#nav').html(html);

                let stime = setTimeout(function () {
                    $('.gv').each(function (index, item) {
                        $(item).css({
                            'transition-delay': 0 + '.' + index + 2 + 's',
                            'width': '300px'
                        });
                        if (index === cList.length - 1) {
                            $('#btn').text('开始抽奖');
                            statisticsFn.render(cList[cList.length - 1], $s('cumulative'));
                            clearTimeout(stime);

                            clearInterval(ctimer);
                            ctimer = null;
                        }
                    })
                    $('#cumulative').animate({
                        opacity: '0'
                    }, 500);
                    $('.nav').animate({
                        opacity: '1'
                    }, 100);
                }, 200)
            }
            else {
                cList = [];
                $('#btn').text('停止抽奖');
                ctimer = setInterval(function () {
                    let index = ~~(Math.random() * lList.length);
                    var strNum = lList[index];
                    cList.indexOf(strNum) === -1 && cList.length < tNumber ? cList.push(strNum) : null;
                    statisticsFn.render(strNum, $s('cumulative'));
                }, 16);
            }
        })




















        var canvas = document.getElementById('canvas'),
            ctx = canvas.getContext('2d'),
            w = canvas.width = window.innerWidth,
            h = canvas.height = window.innerHeight,
            hue = 217,
            stars = [],
            count = 0,
            maxStars = 3000;//星星数量
        var canvas2 = document.createElement('canvas'),
            ctx2 = canvas2.getContext('2d');
        canvas2.width = 100;
        canvas2.height = 100;
        var half = canvas2.width / 2,
            gradient2 = ctx2.createRadialGradient(half, half, 0, half, half, half);
        gradient2.addColorStop(0.025, '#CCC');
        gradient2.addColorStop(0.1, 'hsl(' + hue + ', 61%, 33%)');
        gradient2.addColorStop(0.25, 'hsl(' + hue + ', 64%, 6%)');
        gradient2.addColorStop(1, 'transparent');

        ctx2.fillStyle = gradient2;
        ctx2.beginPath();
        ctx2.arc(half, half, half, 0, Math.PI * 2);
        ctx2.fill();
        function random(min, max) {
            if (arguments.length < 2) {
                max = min;
                min = 0;
            }

            if (min > max) {
                var hold = max;
                max = min;
                min = hold;
            }

            return Math.floor(Math.random() * (max - min + 1)) + min;
        }

        function maxOrbit(x, y) {
            var max = Math.max(x, y),
                diameter = Math.round(Math.sqrt(max * max + max * max));
            return diameter / 2;
            //星星移动范围，值越大范围越小，
        }

        var Star = function () {

            this.orbitRadius = random(maxOrbit(w, h));
            this.radius = random(60, this.orbitRadius) / 8;
            //星星大小
            this.orbitX = w / 2;
            this.orbitY = h / 2;
            this.timePassed = random(0, maxStars);
            this.speed = random(this.orbitRadius) / 50000;
            //星星移动速度
            this.alpha = random(2, 10) / 10;

            count++;
            stars[count] = this;
        }

        Star.prototype.draw = function () {
            var x = Math.sin(this.timePassed) * this.orbitRadius + this.orbitX,
                y = Math.cos(this.timePassed) * this.orbitRadius + this.orbitY,
                twinkle = random(10);

            if (twinkle === 1 && this.alpha > 0) {
                this.alpha -= 0.05;
            } else if (twinkle === 2 && this.alpha < 1) {
                this.alpha += 0.05;
            }

            ctx.globalAlpha = this.alpha;
            ctx.drawImage(canvas2, x - this.radius / 2, y - this.radius / 2, this.radius, this.radius);
            this.timePassed += this.speed;
        }

        for (var i = 0; i < maxStars; i++) {
            new Star();
        }

        function animation() {
            ctx.globalCompositeOperation = 'source-over';
            ctx.globalAlpha = 0.5; //尾巴
            ctx.fillStyle = 'hsla(' + hue + ', 64%, 6%, 2)';
            ctx.fillRect(0, 0, w, h)

            ctx.globalCompositeOperation = 'lighter';
            for (var i = 1, l = stars.length; i < l; i++) {
                stars[i].draw();
            };

            window.requestAnimationFrame(animation);
        }

        animation();
    </script>

</body>

</html>